《Table 1 Condition survey of the model reaction of 1a and 2aa》

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《"基于α-溴代酮的催化不对称合成3,3-螺环丙基吲哚酮和乙烯基环丙烷（英文）"》

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a General conditions:a reaction mixture ofα-bromoacetophenone（1a）（0.15mmol），3-methylene oxindole 2a（0.10 mmol），Na2CO3（0.15 mmol），and catalyst（0.02 mmol）in solvent（1.0 m L）was stirred at specified temperature for specified time.b Isolated yield based on 2a

The structures of compounds 3，5 and 6 were identified by 1H NMR，13C NMR and HRMS-ESI measurements.The representative compounds 3a（CCDC 1940891），5g（CCDC 1940893）and 6（CCDC 1940896）have also been unambiguously confirmed by single crystal X-ray diffraction analyses（For crystal structural data，see Supporting Information）.Some of vinylcyclopropanes 5 are the reported compounds，which were also corroborated by the data disclosed in literature.[14d]